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503 lines
23 KiB
503 lines
23 KiB
// kelondroFlexTable.java
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// (C) 2006 by Michael Peter Christen; mc@anomic.de, Frankfurt a. M., Germany
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// first published 01.06.2006 on http://www.anomic.de
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//
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// $LastChangedDate: 2006-04-02 22:40:07 +0200 (So, 02 Apr 2006) $
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// $LastChangedRevision: 1986 $
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// $LastChangedBy: orbiter $
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//
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// LICENSE
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package de.anomic.kelondro;
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import java.io.File;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import java.util.TreeMap;
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import java.util.TreeSet;
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import de.anomic.server.serverMemory;
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import de.anomic.server.logging.serverLog;
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public class kelondroFlexTable extends kelondroFlexWidthArray implements kelondroIndex {
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// static tracker objects
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private static TreeMap<String, kelondroFlexTable> tableTracker = new TreeMap<String, kelondroFlexTable>();
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// class objects
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protected kelondroBytesIntMap index;
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private boolean RAMIndex;
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public kelondroFlexTable(File path, String tablename, kelondroRow rowdef, int minimumSpace, boolean resetOnFail) {
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// the buffersize applies to a possible load of the ram-index
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// the minimumSpace is a initial allocation space for the index; names the number of index slots
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// if the ram is not sufficient, a tree file is generated
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// if, and only if a tree file exists, the preload time is applied
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super(path, tablename, rowdef, resetOnFail);
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if ((super.col[0].size() < 0) && (resetOnFail)) try {
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super.reset();
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} catch (IOException e2) {
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e2.printStackTrace();
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throw new kelondroException(e2.getMessage());
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}
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minimumSpace = Math.max(minimumSpace, super.size());
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try {
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long neededRAM = 10 * 1024 * 104 + (long) ((super.row().column(0).cellwidth + 4) * minimumSpace * kelondroRowCollection.growfactor);
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File newpath = new File(path, tablename);
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File indexfile = new File(newpath, "col.000.index");
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String description = "";
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description = new String(this.col[0].getDescription());
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int p = description.indexOf(';', 4);
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long stt = (p > 0) ? Long.parseLong(description.substring(4, p)) : 0;
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System.out.println("*** Last Startup time: " + stt + " milliseconds");
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long start = System.currentTimeMillis();
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if (serverMemory.request(neededRAM, false)) {
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// we can use a RAM index
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if (indexfile.exists()) {
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// delete existing index file
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System.out.println("*** Delete File index " + indexfile);
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indexfile.delete();
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}
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// fill the index
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System.out.print("*** Loading RAM index for " + size() + " entries from " + newpath + "; available RAM = " + (serverMemory.available() >> 20) + " MB, allocating " + (neededRAM >> 20) + " MB for index.");
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index = initializeRamIndex(minimumSpace);
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System.out.println(" -done-");
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System.out.println(index.size() + " index entries initialized and sorted from " + super.col[0].size() + " keys.");
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RAMIndex = true;
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tableTracker.put(this.filename(), this);
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} else {
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// too less ram for a ram index
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kelondroIndex ki;
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if (indexfile.exists()) {
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// use existing index file
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System.out.println("*** Using File index " + indexfile);
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ki = new kelondroCache(kelondroTree.open(indexfile, true, 0, treeIndexRow(rowdef.width(0), rowdef.objectOrder), 2, 80));
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RAMIndex = false;
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} else {
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// generate new index file
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System.out.println("*** Generating File index for " + size() + " entries from " + indexfile);
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System.out.println("*** Cause: too less RAM (" + serverMemory.available() + " Bytes) configured. Assign at least " + (neededRAM / 1024 / 1024) + " MB more RAM to enable a RAM index.");
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ki = initializeTreeIndex(indexfile, 0, rowdef.objectOrder);
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System.out.println(" -done-");
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System.out.println(ki.size() + " entries indexed from " + super.col[0].size() + " keys.");
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RAMIndex = false;
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}
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index = new kelondroBytesIntMap(ki);
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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}
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// check consistency
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ArrayList<Integer[]> doubles = index.removeDoubles();
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if (doubles.size() > 0) {
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System.out.println("DEBUG: WARNING - FlexTable " + newpath.toString() + " has " + doubles.size() + " doubles");
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}
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// assign index to wrapper
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description = "stt=" + Long.toString(System.currentTimeMillis() - start) + ";";
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super.col[0].setDescription(description.getBytes());
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} catch (IOException e) {
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if (resetOnFail) {
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RAMIndex = true;
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index = new kelondroBytesIntMap(super.row().column(0).cellwidth, super.rowdef.objectOrder, 0);
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} else {
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throw new kelondroException(e.getMessage());
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}
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}
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}
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public void reset() throws IOException {
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super.reset();
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RAMIndex = true;
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index = new kelondroBytesIntMap(super.row().column(0).cellwidth, super.rowdef.objectOrder, 0);
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}
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public static int staticSize(File path, String tablename) {
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return kelondroFlexWidthArray.staticsize(path, tablename);
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}
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public static int staticRAMIndexNeed(File path, String tablename, kelondroRow rowdef) {
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return (int) ((rowdef.column(0).cellwidth + 4) * staticSize(path, tablename) * kelondroRowCollection.growfactor);
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}
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public boolean hasRAMIndex() {
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return RAMIndex;
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}
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public synchronized boolean has(byte[] key) throws IOException {
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// it is not recommended to implement or use a has predicate unless
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// it can be ensured that it causes no IO
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if ((kelondroAbstractRecords.debugmode) && (RAMIndex != true)) serverLog.logWarning("kelondroFlexTable", "RAM index warning in file " + super.tablename);
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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return index.geti(key) >= 0;
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}
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private kelondroBytesIntMap initializeRamIndex(int initialSpace) {
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int space = Math.max(super.col[0].size(), initialSpace) + 1;
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if (space < 0) throw new kelondroException("wrong space: " + space);
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kelondroBytesIntMap ri = new kelondroBytesIntMap(super.row().column(0).cellwidth, super.rowdef.objectOrder, space);
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Iterator<kelondroNode> content = super.col[0].contentNodes(-1);
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kelondroNode node;
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int i;
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byte[] key;
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while (content.hasNext()) {
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node = content.next();
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i = node.handle().hashCode();
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key = node.getKey();
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assert (key != null) : "DEBUG: empty key in initializeRamIndex"; // should not happen; if it does, it is an error of the condentNodes iterator
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//System.out.println("ENTRY: " + serverLog.arrayList(indexentry.bytes(), 0, indexentry.objectsize()));
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try { ri.addi(key, i); } catch (IOException e) {} // no IOException can happen here
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if ((i % 10000) == 0) {
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System.out.print('.');
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System.out.flush();
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}
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}
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System.out.print(" -ordering- ");
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System.out.flush();
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return ri;
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}
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private kelondroIndex initializeTreeIndex(File indexfile, long preloadTime, kelondroByteOrder objectOrder) throws IOException {
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kelondroIndex treeindex = new kelondroCache(new kelondroTree(indexfile, true, preloadTime, treeIndexRow(rowdef.primaryKeyLength, objectOrder), 2, 80));
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Iterator<kelondroNode> content = super.col[0].contentNodes(-1);
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kelondroNode node;
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kelondroRow.Entry indexentry;
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int i, c = 0, all = super.col[0].size();
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long start = System.currentTimeMillis();
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long last = start;
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while (content.hasNext()) {
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node = content.next();
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i = node.handle().hashCode();
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indexentry = treeindex.row().newEntry();
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indexentry.setCol(0, node.getValueRow());
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indexentry.setCol(1, i);
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treeindex.addUnique(indexentry);
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c++;
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if (System.currentTimeMillis() - last > 30000) {
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System.out.println(".. generated " + c + "/" + all + " entries, " + ((System.currentTimeMillis() - start) / c * (all - c) / 60000) + " minutes remaining");
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System.out.flush();
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last = System.currentTimeMillis();
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}
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}
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return treeindex;
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}
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private static final kelondroRow treeIndexRow(int keywidth, kelondroByteOrder objectOrder) {
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return new kelondroRow("byte[] key-" + keywidth + ", int reference-4 {b256}", objectOrder, 0);
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}
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public synchronized kelondroRow.Entry get(byte[] key) throws IOException {
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if (index == null) return null; // case may happen during shutdown
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int pos = index.geti(key);
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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if (pos < 0) return null;
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// pos may be greater than this.size(), because this table may have deleted entries
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// the deleted entries are subtracted from the 'real' tablesize,
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// so the size may be smaller than an index to a row entry
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/*if (kelondroAbstractRecords.debugmode) {
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kelondroRow.Entry result = super.get(pos);
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assert result != null;
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assert rowdef.objectOrder.compare(result.getPrimaryKeyBytes(), key) == 0 : "key and row does not match; key = " + serverLog.arrayList(key, 0, key.length) + " row.key = " + serverLog.arrayList(result.getPrimaryKeyBytes(), 0, rowdef.primaryKeyLength);
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return result;
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} else {*/
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// assume that the column for the primary key is 0,
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// and the column 0 is stored in a file only for that column
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// then we don't need to lookup from that file, because we already know the value (it's the key)
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kelondroRow.Entry result = super.getOmitCol0(pos, key);
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assert result != null;
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return result;
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//}
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}
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public synchronized void putMultiple(List<kelondroRow.Entry> rows) throws IOException {
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// put a list of entries in a ordered way.
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// this should save R/W head positioning time
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Iterator<kelondroRow.Entry> i = rows.iterator();
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kelondroRow.Entry row;
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int pos;
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byte[] key;
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TreeMap<Integer, kelondroRow.Entry> old_rows_ordered = new TreeMap<Integer, kelondroRow.Entry>();
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ArrayList<kelondroRow.Entry> new_rows_sequential = new ArrayList<kelondroRow.Entry>();
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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while (i.hasNext()) {
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row = i.next();
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key = row.getColBytes(0);
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pos = index.geti(key);
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if (pos < 0) {
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new_rows_sequential.add(row);
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} else {
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old_rows_ordered.put(new Integer(pos), row);
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}
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}
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// overwrite existing entries in index
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super.setMultiple(old_rows_ordered);
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// write new entries to index
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addUniqueMultiple(new_rows_sequential);
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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}
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public synchronized kelondroRow.Entry put(kelondroRow.Entry row, Date entryDate) throws IOException {
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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return put(row);
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}
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public synchronized kelondroRow.Entry put(kelondroRow.Entry row) throws IOException {
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assert (row != null);
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assert (!(serverLog.allZero(row.getColBytes(0))));
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assert row.objectsize() <= this.rowdef.objectsize;
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byte[] key = row.getColBytes(0);
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if (index == null) return null; // case may appear during shutdown
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int pos = index.geti(key);
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if (pos < 0) {
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pos = super.add(row);
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index.puti(key, pos);
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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return null;
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}
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//System.out.println("row.key=" + serverLog.arrayList(row.bytes(), 0, row.objectsize()));
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kelondroRow.Entry oldentry = super.get(pos);
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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if (oldentry == null) {
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serverLog.logSevere("kelondroFlexTable", "put(): index failure; the index pointed to a cell which is empty. content.size() = " + this.size() + ", index.size() = " + ((index == null) ? 0 : index.size()));
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// patch bug ***** FIND CAUSE! (see also: remove)
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int oldindex = index.removei(key);
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assert oldindex >= 0;
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assert index.geti(key) == -1;
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// here is this.size() > index.size() because of remove operation above
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index.puti(key, super.add(row));
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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return null;
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}
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assert oldentry != null : "overwrite of empty position " + pos + ", index management must have failed before";
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assert rowdef.objectOrder.compare(oldentry.getPrimaryKeyBytes(), key) == 0 : "key and row does not match; key = " + serverLog.arrayList(key, 0, key.length) + " row.key = " + serverLog.arrayList(oldentry.getPrimaryKeyBytes(), 0, rowdef.primaryKeyLength);
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super.set(pos, row);
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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return oldentry;
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}
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public synchronized boolean addUnique(kelondroRow.Entry row) throws IOException {
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assert row.objectsize() == this.rowdef.objectsize;
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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return index.addi(row.getColBytes(0), super.add(row));
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}
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public synchronized int addUniqueMultiple(List<kelondroRow.Entry> rows) throws IOException {
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// add a list of entries in a ordered way.
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// this should save R/W head positioning time
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TreeMap<Integer, byte[]> indexed_result = super.addMultiple(rows);
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// indexed_result is a Integer/byte[] relation
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// that is used here to store the index
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Iterator<Map.Entry<Integer, byte[]>> i = indexed_result.entrySet().iterator();
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Map.Entry<Integer, byte[]> entry;
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while (i.hasNext()) {
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entry = i.next();
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index.puti(entry.getValue(), entry.getKey().intValue());
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}
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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return indexed_result.size();
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}
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public synchronized ArrayList<kelondroRowSet> removeDoubles() throws IOException {
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ArrayList<Integer[]> indexreport = index.removeDoubles();
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ArrayList<kelondroRowSet> report = new ArrayList<kelondroRowSet>();
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Iterator<Integer[]> i = indexreport.iterator();
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Integer[] is;
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kelondroRowSet rows;
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TreeSet<Integer> d = new TreeSet<Integer>();
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while (i.hasNext()) {
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is = i.next();
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rows = new kelondroRowSet(this.rowdef, is.length);
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for (int j = 0; j < is.length; j++) {
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d.add(is[j]);
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rows.addUnique(this.get(is[j].intValue()));
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}
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report.add(rows);
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}
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// finally delete the affected rows, but start with largest id first, othervise we overwrite wrong entries
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Integer s;
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while (d.size() > 0) {
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s = d.last();
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d.remove(s);
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this.remove(s.intValue());
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}
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return report;
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}
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public synchronized kelondroRow.Entry remove(byte[] key, boolean keepOrder) throws IOException {
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assert keepOrder == false; // the underlying data structure is a file, where the order cannot be maintained. Gaps are filled with new values.
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int i = index.removei(key);
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assert (index.geti(key) < 0); // must be deleted
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if (i < 0) {
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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return null;
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}
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kelondroRow.Entry r = super.getOmitCol0(i, key);
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if (r == null) {
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serverLog.logSevere("kelondroFlexTable", "remove(): index failure; the index pointed to a cell which is empty. content.size() = " + this.size() + ", index.size() = " + ((index == null) ? 0 : index.size()));
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// patch bug ***** FIND CAUSE! (see also: put)
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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return null;
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}
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assert r != null : "r == null"; // should be avoided with path above
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assert rowdef.objectOrder.compare(r.getPrimaryKeyBytes(), key) == 0 : "key and row does not match; key = " + serverLog.arrayList(key, 0, key.length) + " row.key = " + serverLog.arrayList(r.getPrimaryKeyBytes(), 0, rowdef.primaryKeyLength);
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super.remove(i);
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assert super.get(i) == null : "i = " + i + ", get(i) = " + serverLog.arrayList(super.get(i).bytes(), 0, 12);
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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return r;
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}
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public synchronized kelondroRow.Entry removeOne() throws IOException {
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int i = index.removeonei();
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if (i < 0) return null;
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kelondroRow.Entry r;
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r = super.get(i);
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super.remove(i);
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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return r;
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}
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public synchronized kelondroCloneableIterator<byte[]> keys(boolean up, byte[] firstKey) throws IOException {
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return index.keys(up, firstKey);
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}
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public synchronized kelondroCloneableIterator<kelondroRow.Entry> rows(boolean up, byte[] firstKey) throws IOException {
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if (index == null) return new rowIterator(up, firstKey);
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assert this.size() == index.size() : "content.size() = " + this.size() + ", index.size() = " + index.size();
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return new rowIterator(up, firstKey);
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}
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public class rowIterator implements kelondroCloneableIterator<kelondroRow.Entry> {
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kelondroCloneableIterator<kelondroRow.Entry> indexIterator;
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boolean up;
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public rowIterator(boolean up, byte[] firstKey) throws IOException {
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this.up = up;
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indexIterator = index.rows(up, firstKey);
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}
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public rowIterator clone(Object modifier) {
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try {
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return new rowIterator(up, (byte[]) modifier);
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} catch (IOException e) {
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return null;
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}
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}
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|
|
|
public boolean hasNext() {
|
|
return indexIterator.hasNext();
|
|
}
|
|
|
|
public kelondroRow.Entry next() {
|
|
kelondroRow.Entry idxEntry = null;
|
|
while ((indexIterator.hasNext()) && (idxEntry == null)) {
|
|
idxEntry = (kelondroRow.Entry) indexIterator.next();
|
|
}
|
|
if (idxEntry == null) {
|
|
serverLog.logSevere("kelondroFlexTable.rowIterator: " + tablename, "indexIterator returned null");
|
|
return null;
|
|
}
|
|
int idx = (int) idxEntry.getColLong(1);
|
|
try {
|
|
return get(idx);
|
|
} catch (IOException e) {
|
|
e.printStackTrace();
|
|
return null;
|
|
}
|
|
}
|
|
|
|
public void remove() {
|
|
indexIterator.remove();
|
|
}
|
|
|
|
}
|
|
|
|
public kelondroProfile profile() {
|
|
return index.profile();
|
|
}
|
|
|
|
public static final Iterator<String> filenames() {
|
|
// iterates string objects; all file names from record tracker
|
|
return tableTracker.keySet().iterator();
|
|
}
|
|
|
|
public static final kelondroProfile profileStats(String filename) {
|
|
// returns a map for each file in the tracker;
|
|
// the map represents properties for each record oobjects,
|
|
// i.e. for cache memory allocation
|
|
kelondroFlexTable theFlexTable = (kelondroFlexTable) tableTracker.get(filename);
|
|
return theFlexTable.profile();
|
|
}
|
|
|
|
public static final Map<String, String> memoryStats(String filename) {
|
|
// returns a map for each file in the tracker;
|
|
// the map represents properties for each record objects,
|
|
// i.e. for cache memory allocation
|
|
kelondroFlexTable theFlexTable = (kelondroFlexTable) tableTracker.get(filename);
|
|
return theFlexTable.memoryStats();
|
|
}
|
|
|
|
private final Map<String, String> memoryStats() {
|
|
// returns statistical data about this object
|
|
HashMap<String, String> map = new HashMap<String, String>();
|
|
map.put("tableIndexChunkSize", (!RAMIndex) ? "0" : Integer.toString(index.row().objectsize));
|
|
map.put("tableIndexCount", (!RAMIndex) ? "0" : Integer.toString(index.size()));
|
|
map.put("tableIndexMem", (!RAMIndex) ? "0" : Integer.toString((int) (index.row().objectsize * index.size() * kelondroRowCollection.growfactor)));
|
|
return map;
|
|
}
|
|
|
|
public synchronized void close() {
|
|
if (tableTracker.remove(this.filename) == null) {
|
|
serverLog.logWarning("kelondroFlexTable", "close(): file '" + this.filename + "' was not tracked with record tracker.");
|
|
}
|
|
if ((index != null) && (this.size() != ((index == null) ? 0 : index.size()))) {
|
|
serverLog.logSevere("kelondroFlexTable", "close(): inconsistent content/index size. content.size() = " + this.size() + ", index.size() = " + ((index == null) ? 0 : index.size()));
|
|
}
|
|
|
|
if (index != null) {index.close(); index = null;}
|
|
super.close();
|
|
}
|
|
|
|
public static void main(String[] args) {
|
|
// open a file, add one entry and exit
|
|
File f = new File(args[0]);
|
|
String name = args[1];
|
|
kelondroRow row = new kelondroRow("Cardinal key-4 {b256}, byte[] x-64", kelondroNaturalOrder.naturalOrder, 0);
|
|
try {
|
|
kelondroFlexTable t = new kelondroFlexTable(f, name, row, 0, true);
|
|
kelondroRow.Entry entry = row.newEntry();
|
|
entry.setCol(0, System.currentTimeMillis());
|
|
entry.setCol(1, "dummy".getBytes());
|
|
t.put(entry);
|
|
t.close();
|
|
} catch (IOException e) {
|
|
e.printStackTrace();
|
|
}
|
|
}
|
|
|
|
}
|